Language, memory, and figural ability hypotheses in retardates of mental age four.
D002648:Child; D003071:Cognition; D005163:Factor Analysis, Statistical; D005260:Female; D005556:Form Perception; D006801:Humans; D008607:Intellectual Disability; D007804:Language Development; D008297:Male; D008568:Memory; D011581:Psychological Tests; D012660:Semantics